Furnace.



.ud. 706,496. Patented Aug. 5, I902.

E; 0.'RICKARD.

FURNACE.

(Application filed. Feb. 6, 1900. (No llodbl.) 5 Sheets$hao& I.

WITNESSES: BY

ATTORNEYS No. 706,496. Patented Aug. 5; I902.

E. o. BICKARD.

FURNACE.

(Application filed Pal 6, 1900.) (No llqdel.) 5 Shaats-8hut 2.

will wfl r13? Z:

TN SE8: I I V NTOR E A a I BY ATTORNEYS Patented Aug. 5, I902. E. 0. RICKARD.

F U R N A C E (Application filed Feb. 6, ,1900.)

'5 Shoets-$haef 3.

(No Model.)

k INVENTOR A ll/A r iisiii w f r IH r ll ll ll 11 IIIUIIW ATTORNEYS mum. unmmwunua.

E. 0. BICKABH.

FURNACE.

(Application filed Feb. 6, 1900.)

(No Model.) 5 Shoots-Shed 4.

I M x 1 W zi W '1 W|TNESSES: a INVENTOR M105, BY

ATTORNEYS P a't e nted Aug. 5; 1962.

RICKARD. F U B N A C E (Application Fab. 8, 1900.)

(No mum I NVENTOR v @mfl.

' ATTORNEYS per plate shown in said figure.

UNITED STATES PATENT OFFICE.

ELZIVER O. RIOKARD, OF SYRACUSE, NEW YORK, ASSIGNOR TO THE KELSEY FURNACE COMPANY, OF SYRACUSE, NEW YORK.

FURNACE.

SPECIFICATION forming part of Letters Patent N 0. 706,496, dated August 5, 1902.

Application filed February 6, 1900. Serial No. 4.164. (No model.)

To all whomrlt may concern.-

Be it known that I, ELZIVER O. RICKARD, of Syracuse, in the county of Onondaga and State of New York, have inven ted certain new and useful Improvements in Furnaces, of

which the following is a specification.

My invention relates to improvements in furnaces for heating air, and has for its object the production of a device for the desired purpose which is particularly simple in con struction, strong and durable in use, and highly efficient in operation; and to this end it consists in the combination, construction, and arrangement of the component parts of I 5 a furnace, as hereinafter fully described, and

pointed out in the claims.

In describing this invention referenceis had to the accompanying drawings, forming part of this specification, in which like letters in- 2o dicate corresponding parts in all the views.

Figure 1 is a vertical sectional view, partly broken away,of my improved furnace. Figs. 2 and 3 are respectively top, plan, and rear elevations of the parts illustrated in Fig. 1,

2 5 the outer shell, the cold-air chamber, and the ash-box being removed. Fig. tis'a top plan view, partly broken away, of the parts shown in Fig. 3, the detachable central portion of the upper plate seen in said Fig. 3 being removed. Fig. 5 is a front elevation, partly broken away and in section, of the parts illustrated in Fig. 4. Figs. 6'and 7 are transverse sectional views looking in opposite directions, taken on line 6 7, Fig. 1. Fig. Sis

a vertical sectional View taken on line'8 8,

Figs. 9 and 10 are respectively top Fi 2. plain of the detachable central portionof the lower plate seen in Fig. 8 and invertedplan of the detachable central portion of the up isometric view of oneof the detached airheatingcond'uits of my furnace. Figs. 12 and 13 are respectively inverted views of the outer portion of the upper plate illustrated in Fig. 8 and top plan view of the outer portion of the lower plate shown in said figure.

My improved furnace consists, essentially,

of a combustion-chamber A, an ash-box B, a

cold-air chamber 0, air-heating conduits and chambers D D D a chamberE for receiving the products of combustion, and an outer Fig. 11 is an shell F. The combustion-chamber A is of any desirable form and size, being here illustrated as cylindrical and as inclosed by the air-heating conduits and chambers D D D and upper and lower separable plates a a and as communicating with a fuel-inlet passage C62, extending rearwardly from the front of the furnace. Said plates 0. a project outwardly beyond the combustion-chamber A, are provided with detachable central portions (l -6L and with openings a extending vertically through their outer portions and alined with each other, and are united together by inner and outer series of bolts a a engaged,

respectively,with the inner and outer portions of said plates at a and passed through the conduits D, presently described. The opposing faces of the plates at a are formed with substantially vertical projecting shoulders a a and flanges a a ,the flange 0. of the upper plate a. being extended downwardly and formed of less diameter than said plate and the flanged of the lower plate a. being extended upwardly and formed of greater height than the flange a and being provided with an outwardly-proj ecting peripheral shoulder 0. arranged above the top face of the plate a. Said flange a is also provided with an opening (L13, extending horizontally through its front part beneath the shoulder a and with outwardly-projecting tubular branches or extensions h arranged beneath said shoulder a one or more of the branches or extensions a being provided with a suitable closure at for permitting cleaning of the chamber E and anotherof the branches or extensionsibeing connected to a smoke-conduit G.

1 The ash-box B is arranged beneath the combustionchamber A and extends forwardly beyond saidchamber A, the top I) of the forwardly-extending part of the ash-box being separated from the contiguous portion of the plate a, previously described. The cold-air chamber 0 partly incloses the ash-box B and extends upwardly above the forwardly-projecting part of said ash-box.

The air-heating conduits and chambers D D D extend vertically around the combustion-chamber A. Said conduits D are arranged at opposite sides of the fuel-inlet passage a are of substantially uniform length,

contact with each other and their upper portions corrugated and separated for forming corrugated heating-surfaces within the con- H duits D and corrugated passages or flues d,

leading from the combustion-chamber A between the conduits D to the chamber E. The

air-heating chamber D is formed with an open top communicating with one of the openings a of the upper plate a. The air-heating chamber D is arranged beneath the fuel-inlet passage a above the forwardly-projecting part of the ash-box B and between the separated conduits D at opposite sides of said fuel-inlet passage and is formed with its bottom and front sides open for communicating, respectively, with one of the openings a of the plate a and the opening a of the flange a, said openings a a thus forming, essentially, upper and lower air-circulating openings for the chamber D The chamberE is inclosed by the upper and lower plates a a-,previously described,-a tubular shell 6, the outer walls of the conduits and chamber D D, and the inner wall of the chamber D Said'tubular shell 6 preferably consists of a split steel shell surrounding the flange a of the plate a and the upper portion of the flange a and having its end edges respectively engaged with the lower face of the upper plate on and the shoulder (1, of the lower plate a and its contiguous edges secured together by suitable fastening means c The tubular shell 6 is usually provided with a fixed nipple e, which projects through the outer shellfand is connected to the smokeconduit G.

' The outer shell F is of any desirable form, size, and construction and receives the air heated by my furnace.

The construction and operation of my furnace will now be readily understood upon reference to the foregoing description and the accompanying drawings,and itWill be obvious that more or less change may be made in the detail construction and arrangement of its component parts without departing from the spirit of my invention.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent,is

1. In a furnace, the combination of upper and lower separable plates having openings extending vertically therethrough, a tubular shell interposed between the upper and lower plates, and upright air-heating conduits arranged between the upper and lower plates within the tubular shell and communicating with the openings in the upper and lower plates, the lower portions of the opposing walls of contiguous conduits being formed substantially flat and engaged with each other and the upper portions of said walls being corrugated and separated, substantially as and for the purpose set forth.

2. In a furnace, the combination of upper and lower separable plates provided with openings ext-ending vertically therethrough and having their opposing faces formed with substantially vertical flanges, the flange of the upper plate being of less diameter than said upper wall, and the flange of the lower plate being provided with a peripheral shoulder arranged above the top face of the lower plate, a tubular shell surrounding theflange of the upper plate and the upper portion of the flange of the'lower plate, and having its end edges respectively engaged with the lower face of the upper plate and the peripheral shoulder of the flange of the lower plate, upright air-heating conduits arranged between the upper and lower plates within the tubular shell and communicating with the openings in the upper and lower plates, the lower portions of the opposing walls of contiguous conduits being formed substantially flat and engaged with each other and the upper portions of said walls being corrugated and separated, and bolts passedthrough the air-heating conduits and engaged with the upper and lower plates, substantially as and for the purpose specified.

3. In a furnace, the combination of upper and lower separable plates having openings extending vertically therethrough, the upper plate being provided with a detachable central portion encircled by the openings therein, and the lower plate being provided with an upwardly-extending flange having outwardly-projecting tubular branches or extensions, a tubular shell interposed between the upper plate and the upwardly-extending flange of the lower plate above the tubular branches or extensions, upright air-heating conduits arranged between the upper and lower plates and communicating with the openings in said plates, and bolts passed through the air-heating conduits and engaged with the detachable central portion of the upper plate and with the lower plate, substantially as and for the purpose set forth.

4. In a furnace, the combination of upper and lower separable plates having openings extending vertically therethrough and being each provided with a detachable central portion encircled by the openings therein, the

lower plate being also provided with an upwardly-extending flange having outwardlyprojecting tubular branches or extensions, a tubular shell interposed between the upper plate and the upwardly-extending flange of the lower plate above the tubular branches or extensions, upright air-heating conduits arranged between the upper and lower plates and communicating with the openings in said plates, an outer series of bolts passed through the air-heating conduits and engaged with the outer portions of the upper and lower plates, and an inner series of bolts passed through the air-heatin g conduits and engaged with the detachable central portions of the upper and lower plates, substantially as and for the purpose described.

5. In a furnace, thecombination of upper and lower separable plates having openings extending vertically therethrough, a tubular shell interposed between the upper and lower plates, upright air-heating conduits arranged between the upper and lower plates within the tubular shell and communicating with the openings in the upper and lower plates, the

. opposing walls of two of the conduits being separated and the remaining opposing walls of each pair of the conduits having their lower portions engaged with each other and their upper portions corrugated and separated, and an air-heating chamber arranged between the opposing separated walls of said two of the conduits and formed with upper and lower openings for the air, substantially as and for the purpose set forth.

6. In a furnace, the combination of upper and lower separable plates having openings extending vertically therethrough, the-lower plate being provided with an upwardly-extending flange formed with an opening extending horizontally therethrough, a tubular shell interposed between the upper plate and the upwardly-extending flange of the lower plate, upright air-heating conduits arranged between the upper and lower plates within the tubular shell and communicating with corresponding openings in said plates, the opposing walls of two of the conduits being separated, and the remaining opposing walls of each pair of the conduits having their lower portions engaged with each other and their upper portions corrugated and separated, and an air-heating chamber arranged between the opposing separated walls of said two of the conduits and formed with upper and lower openings communicating with one of the openings extending vertically through the lower plate and the opening extending horizontally through the upwardly extending flange of said lower plate, substantially as and for the purpose described.

In testimony whereof I have hereunto signed my name, in thepresence of two attesting witnesses, at Syracuse, in the county of Onondaga, in the State of New York, this 27th day of December, 1899.

ELZIVER O. RIOKARD.

WV itnesses:

K. H. TIIEOBALD, S. DAVIS. 

